*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }
        body {
            font-family: 'Segoe UI', Roboto, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            background: #f5f7fb;
            color: #1e2a3a;
            line-height: 1.7;
            padding: 0;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: #1a6bb0;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: #c44536;
            text-decoration: underline;
        }
        ul,
        ol {
            padding-left: 1.5rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .site-header {
            background: linear-gradient(135deg, #0f1f38 0%, #1a3a5c 100%);
            color: #fff;
            padding: 0 0 12px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .header-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .my-logo {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            background: linear-gradient(to right, #f9d976, #f39c12);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-shadow: none;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .my-logo i {
            -webkit-text-fill-color: #f39c12;
            font-size: 1.6rem;
        }
        .my-logo:hover {
            opacity: 0.9;
            text-decoration: none;
        }
        .my-logo small {
            font-size: 0.75rem;
            font-weight: 400;
            -webkit-text-fill-color: rgba(255, 255, 255, 0.6);
            display: block;
            letter-spacing: 1px;
        }
        .nav-wrapper {
            display: flex;
            align-items: center;
            gap: 18px;
        }
        .main-nav {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .main-nav a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            transition: all 0.25s;
            white-space: nowrap;
        }
        .main-nav a:hover,
        .main-nav a.active {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            text-decoration: none;
        }
        .hamburger {
            display: none;
            background: none;
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1.5rem;
            padding: 6px 12px;
            border-radius: 8px;
            cursor: pointer;
            transition: background 0.2s;
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        #nav-toggle {
            display: none;
        }
        .breadcrumb-wrap {
            background: rgba(255, 255, 255, 0.06);
            padding: 6px 20px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.65);
            max-width: 1200px;
            margin: 0 auto;
        }
        .breadcrumb-wrap a {
            color: rgba(255, 255, 255, 0.8);
        }
        .breadcrumb-wrap a:hover {
            color: #f9d976;
            text-decoration: none;
        }
        .breadcrumb-wrap span {
            color: rgba(255, 255, 255, 0.5);
        }
        .main-content {
            padding: 30px 0 50px;
        }
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
        }
        .content-body {
            background: #fff;
            border-radius: 20px;
            padding: 40px 40px 50px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
        }
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 20px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 14px;
            border-left: 4px solid #f39c12;
            padding-left: 12px;
            color: #0f1f38;
        }
        .sidebar-card ul {
            list-style: none;
            padding: 0;
        }
        .sidebar-card li {
            margin-bottom: 8px;
        }
        .sidebar-card li a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .sidebar-card li a:hover {
            background: #f0f4fe;
            text-decoration: none;
        }
        .sidebar-card li a i {
            color: #f39c12;
            width: 18px;
            text-align: center;
        }
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #0f1f38;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1a3a5c;
            margin: 36px 0 14px 0;
            padding-bottom: 8px;
            border-bottom: 3px solid #f0f0f0;
        }
        h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: #1e2a3a;
            margin: 28px 0 12px 0;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #2c3e50;
            margin: 20px 0 8px 0;
        }
        p {
            margin-bottom: 18px;
            color: #2d3748;
        }
        .content-body p:last-of-type {
            margin-bottom: 0;
        }
        .lead {
            font-size: 1.15rem;
            color: #4a5568;
            font-weight: 400;
            border-left: 4px solid #f39c12;
            padding-left: 20px;
            background: #fafafa;
            border-radius: 0 8px 8px 0;
            padding: 14px 20px;
        }
        .highlight-box {
            background: #fef9e7;
            border-left: 5px solid #f39c12;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .tip-box {
            background: #eaf5ff;
            border-left: 5px solid #1a6bb0;
            padding: 18px 22px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
        }
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
        .stat-item {
            background: #f8fafc;
            border-radius: 14px;
            padding: 20px 16px;
            text-align: center;
            border: 1px solid #e8edf3;
        }
        .stat-item .num {
            font-size: 2rem;
            font-weight: 800;
            color: #f39c12;
            display: block;
        }
        .stat-item .label {
            font-size: 0.9rem;
            color: #4a5568;
        }
        .feature-img {
            border-radius: 16px;
            margin: 28px 0;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
            width: 100%;
        }
        .interactive-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            margin: 44px 0 20px;
            padding-top: 30px;
            border-top: 2px solid #e8edf3;
        }
        .interactive-card {
            background: #f8fafc;
            border-radius: 16px;
            padding: 24px 22px;
            border: 1px solid #e8edf3;
            transition: box-shadow 0.2s;
        }
        .interactive-card:hover {
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.04);
        }
        .interactive-card h3 {
            margin-top: 0;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .interactive-card h3 i {
            color: #f39c12;
        }
        .search-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .search-form input {
            flex: 1;
            min-width: 160px;
            padding: 12px 16px;
            border: 2px solid #dce3ec;
            border-radius: 30px;
            font-size: 0.95rem;
            outline: none;
            transition: border 0.2s;
            background: #fff;
        }
        .search-form input:focus {
            border-color: #f39c12;
        }
        .search-form button,
        .comment-form button,
        .score-form button {
            padding: 12px 24px;
            background: #1a3a5c;
            color: #fff;
            border: none;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s, transform 0.1s;
            font-size: 0.95rem;
        }
        .search-form button:hover,
        .comment-form button:hover,
        .score-form button:hover {
            background: #f39c12;
            transform: scale(1.02);
        }
        .comment-form textarea {
            width: 100%;
            padding: 12px 16px;
            border: 2px solid #dce3ec;
            border-radius: 14px;
            font-size: 0.95rem;
            resize: vertical;
            min-height: 80px;
            outline: none;
            font-family: inherit;
            transition: border 0.2s;
            background: #fff;
        }
        .comment-form textarea:focus {
            border-color: #f39c12;
        }
        .comment-form .row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
            margin-top: 10px;
        }
        .comment-form .row input {
            flex: 1;
            min-width: 120px;
            padding: 10px 16px;
            border: 2px solid #dce3ec;
            border-radius: 30px;
            font-size: 0.9rem;
            outline: none;
        }
        .comment-form .row input:focus {
            border-color: #f39c12;
        }
        .score-form .stars {
            display: flex;
            gap: 6px;
            font-size: 1.8rem;
            color: #dce3ec;
            cursor: pointer;
            margin: 8px 0 14px;
            transition: color 0.15s;
        }
        .score-form .stars i:hover,
        .score-form .stars i.active {
            color: #f39c12;
        }
        .score-form .stars i {
            transition: color 0.1s, transform 0.1s;
        }
        .score-form .stars i:hover {
            transform: scale(1.15);
        }
        .site-footer {
            background: #0f1f38;
            color: rgba(255, 255, 255, 0.8);
            padding: 40px 20px 24px;
            margin-top: 30px;
        }
        .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-inner h4 {
            color: #f9d976;
            margin-bottom: 14px;
            font-size: 1.05rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 8px;
        }
        .footer-inner a {
            color: rgba(255, 255, 255, 0.7);
            display: block;
            padding: 3px 0;
            font-size: 0.9rem;
        }
        .footer-inner a:hover {
            color: #f9d976;
            text-decoration: none;
        }
        friend-link {
            display: block;
            padding: 4px 0;
        }
        friend-link a {
            display: inline;
            padding: 0 4px;
        }
        .copyright {
            text-align: center;
            padding-top: 28px;
            margin-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }
        .copyright strong {
            color: rgba(255, 255, 255, 0.7);
        }
        @media (max-width: 900px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
            .sidebar {
                order: 2;
            }
            .content-body {
                padding: 24px 18px;
            }
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .interactive-section {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            .header-inner {
                padding: 10px 16px;
            }
            .my-logo {
                font-size: 1.4rem;
            }
            .my-logo small {
                font-size: 0.6rem;
            }
        }
        @media (max-width: 700px) {
            .hamburger {
                display: block;
            }
            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                background: rgba(15, 31, 56, 0.98);
                padding: 16px 12px;
                border-radius: 0 0 16px 16px;
                gap: 4px;
                margin-top: 10px;
                position: absolute;
                left: 0;
                top: 100%;
                box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
            }
            #nav-toggle:checked~.main-nav {
                display: flex;
            }
            .nav-wrapper {
                position: relative;
                gap: 10px;
            }
            .main-nav a {
                padding: 10px 16px;
                border-radius: 10px;
                font-size: 1rem;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
            }
            .content-body {
                padding: 18px 14px;
                border-radius: 14px;
            }
            .lead {
                font-size: 1rem;
                padding: 12px 16px;
            }
            .breadcrumb-wrap {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }
        @media (max-width: 480px) {
            .stat-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 1.6rem;
            }
            .search-form input {
                min-width: 100px;
            }
            .interactive-card {
                padding: 16px 14px;
            }
        }
        .text-small {
            font-size: 0.85rem;
            color: #6b7a8f;
        }
        .mt-1 {
            margin-top: 12px;
        }
        .mb-1 {
            margin-bottom: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .updated-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #e8f0fe;
            color: #1a6bb0;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
        }
        .updated-badge i {
            font-size: 0.7rem;
        }